Home / 8,519.36-12,780.74-2,971.21

Finding the Fourth Proportional to 8,519.36, 12,780.74 and 2,971.21

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Solution

The fourth proportional to 8,519.36, 12,780.74 and 2,971.21 is: 4,457.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,519.36 : 12,780.74 = 2,971.21 : x
  2. Step 2: Convert to fraction form
    8,519.36/12,780.74 = 2,971.21/x
  3. Step 3: Cross multiply
    8,519.36x = 12,780.74 × 2,971.21
  4. Step 4: Simplify right side
    8,519.36x = 37,974,237.97
  5. Step 5: Solve for x
    x = 37,974,237.97/8,519.36
  6. Step 6: Final answer
    x = 4,457.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.